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Preparation method of pseudomonas aeruginosa-resistant nano-composite paper

A Pseudomonas aeruginosa, nanocomposite technology, applied in chemical instruments and methods, paper, papermaking, etc., can solve the problems of limited antibacterial species, influence of tension resistance, flexibility performance, influence of tension resistance and flexibility, etc. Avoid adverse effects, have significant antibacterial effect, and improve the effect of antibacterial effect

Active Publication Date: 2021-06-25
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The weak point of this method is: (1) complicated process, such as wherein, Atractylodes atractylodes stearin, by commercially available Atractylodes atractylodis dry rhizome, extracts the total volatile oil extract prepared with steam distillation method according to Chinese Pharmacopoeia appendix method, and the acquisition rate is only 6.3%
(2) Since the inorganic silver antibacterial agent is a specially prepared silica-loaded silver antibacterial agent, the use of this inorganic silver antibacterial agent has increased the cost; (3) the antibacterial composition is directly sprayed on the surface of the paper, and the tensile strength of the paper is reduced. (4) The antibacterial effect is limited: only the antibacterial test results of Staphylococcus aureus are given, and for Escherichia coli and Pseudomonas aeruginosa, only theoretically estimated expected values ​​are given
There are three shortcomings in this method: one is the use of nano-silver antibacterial powder, which increases the cost; the other is that the coating layer is directly attached to the surface of the paper substrate, which affects the tensile strength and flexibility of the paper; the third is that the antibacterial paper used The antibacterial types are very limited, that is, they only have antibacterial effects on Staphylococcus aureus and Escherichia coli, and have poor inhibitory effects on other bacteria
The disadvantages of this method are: 1) the use of screw extrusion processing and bio-enzyme fermentation process increases the complexity of the preparation process; 2) the use of graphene dispersion increases the cost; 3) the types of antibacterial are limited, only for Staphylococcus aureus, Escherichia coli, hemolytic streptococcus have inhibitory effect, but can not inhibit Pseudomonas aeruginosa

Method used

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  • Preparation method of pseudomonas aeruginosa-resistant nano-composite paper
  • Preparation method of pseudomonas aeruginosa-resistant nano-composite paper
  • Preparation method of pseudomonas aeruginosa-resistant nano-composite paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1, preparing a composite antibacterial paper containing 64.3% magnesium aluminum hydrotalcite and 35.7% magnesium hydroxide nanocrystals in the modified magnesium-based reinforced composite precipitate after washing.

[0065] Step 1, prepare a magnesium salt solution with magnesium chloride and magnesium nitrate at a molar ratio of 1:1.

[0066] 1.1) 27.611 grams of MgCl 2 and 43.01 g of Mg(NO 3 ) 2 Dissolve in 1000ml deionized water and mix;

[0067] 1.2) Filter to remove impurities in the magnesium salt solution, and prepare a magnesium salt solution with a concentration of 0.58mol / L:

[0068] 1.2.1) Put the funnel on the instrument support, and put the clean beaker under the funnel;

[0069] 1.2.2) Fold the filter paper onto the funnel;

[0070] 1.2.3) Pour the magnesium salt solution onto the filter paper at a rate of 50 ml / min to obtain a magnesium salt solution.

[0071] Step 2, prepare hydroxide ion solution.

[0072] Dissolve 51 g of NaOH into 150...

Embodiment 2

[0102] Example 2, preparing a composite antibacterial paper containing 71.5% magnesium aluminum hydrotalcite and 28.5% magnesium hydroxide nanocrystals in the modified magnesium-based reinforced composite precipitate after washing.

[0103] Step 1, using magnesium chloride and magnesium nitrate with a molar ratio of 1:1 to prepare a magnesium salt solution.

[0104] 1a) 37.132 grams of MgCl 2 and 57.841 g of Mg(NO 3 ) 2 Dissolve in 1000ml deionized water and mix;

[0105] 1b) filter to remove impurities in the magnesium salt solution, and prepare a magnesium salt solution with a concentration of 0.78mol / L:

[0106] The specific implementation of this step is the same as step 1.2) of Example 1.

[0107] Step 2, dissolve 79.2 grams of NaOH into 1500 ml of deionized water and mix to prepare a hydroxide ion solution with a concentration of 1.32 mol / L.

[0108] Step three, the Na of 22.26g 2 CO 3 Dissolve in 500mL of deionized water to prepare a sodium carbonate solution wit...

Embodiment 3

[0135] Example 3, preparation of composite antibacterial paper containing 73.8% magnesium aluminum hydrotalcite and 26.2% magnesium hydroxide nanocrystals in the modified magnesium-based reinforced composite precipitate after washing.

[0136] Step A, prepare a magnesium salt solution with magnesium chloride and magnesium nitrate with a molar ratio of 1:1: dissolve 60 g of magnesium chloride and 93.24 g of magnesium nitrate in 1000 mL of deionized water and mix, filter to remove impurities in the magnesium salt solution, and prepare Concentration is the magnesium salt solution of 1.26mol / L, wherein filtration removes the impurity in the magnesium salt solution, and its realization process is identical with step 1.2) among the embodiment 1.

[0137] Step B, preparing a hydroxide ion solution: dissolving 87g of NaOH into 1500mL of deionized water and mixing to prepare a hydroxide ion solution with a concentration of 1.45mol / L.

[0138] Step C, prepare sodium carbonate solution: ab...

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Abstract

The invention discloses a preparation method of pseudomonas aeruginosa-resistant nano composite paper, and mainly solves the problems of low pseudomonas aeruginosa killing rate, expensive raw materials and high preparation cost of antibacterial paper in the prior art. According to the implementation scheme, the method comprises the following steps: 1) respectively preparing a magnesium salt solution, a turbid liquid containing aluminum ions, a hydroxyl ion solution, a sodium carbonate solution, an L-alanine solution, a sodium oleate solution and a hexadecyl trimethyl ammonium bromide solution, performing mixing, heating and stirring to obtain a modified magnesium-based reinforced composite turbid liquid; 2) sequentially standing, filtering and washing the turbid liquid to obtain a precipitate; and (3) adding cut waste paper into the precipitate to obtain modified magnesium-based reinforced nano-composite paper pulp, and performing sieving and airing to obtain the antibacterial paper. The composite paper is non-toxic and non-corrosive; is obvious in antibacterial effect; and is low in preparation cost, simple in process, conducive to improvement of paper printing quality and toughness, and capable of being used for indoor decoration of large office occasions in the building industry.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a method for preparing nanocomposite paper, which can be used in the construction industry for interior decoration of hospitals, large-scale office places, hotels, restaurants, schools, and resident families, as well as paper for the food industry and hospitals. Manufacturing packaging, work protective clothing, preventing the spread of Pseudomonas aeruginosa and the diseases it causes. Background technique [0002] At present, in the world, Pseudomonas aeruginosa has become a "super bacteria" that seriously threatens the safety of human life and health. This is because, on the one hand, the number of cross-infections in hospitals has increased in recent years, and Pseudomonas aeruginosa, like Staphylococcus, Enterococcus and Escherichia coli, has become the most important pathogen causing cross-infection. On the other hand, Pseudomonas aeruginosa, togethe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/36D21H17/69D21H17/67D21H17/66D21H21/52C01F7/00
CPCD21H21/36D21H17/69D21H17/675D21H17/66D21H21/52C01F7/77
Inventor 任庆利王中林杨如森
Owner XIDIAN UNIV
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